Estimate the number of stars in the milky way

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The sun, mass 2.0 X 10^30 kg, is revolving regarding the center of the Milky Way galaxy, which is 2.2 X 10^20 m away. It completes one revolution each 2.5 X 10^8 years. Estimate the number of stars in the Milky Way.

(Hint: Suppose for simplicity that the stars are distributed with spherical symmetry about the galactic center and that our sun is basically at the galactic edge)  

Reference no: EM13658817

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